Problem with editing publication types

Hello,

I'm new to Biblio and am running into a problem where edits to newly created or existing publication types result in the loss of various field values. What's happening is that a new publication type gets created correctly, but if you try to make any changes (ex, make an additional field visible or required), the values for the common title and hint fields are lost upon save, leaving end users unsure about how to complete the form. I've found that the same is true for existing publication types.

Is there something I'm missing about how the "common" fields work here? Also tested on a (mostly) fresh D7 install and got the same results.

Thanks much,

-Ben